Post-hole-drilling machine.



AUGUST T. NISWANGER, OF CHICAGO, ILLINOIS. y

POST-HOLE-DRILLING MACHINE.

Specicaton of Letters Patent. y Patented Feb. 25, 1919.

Application led May 13, 1918. Serial No. 234,327.

To all 'whompz' may concern:

Be it known that I, AUGUs'r T. Nrs- WANGER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Post-Hole- Drilling Machines, of which the following is a specication.

This invention relates to improvement in post hole drilling machines, and the object of this improvement is to provide a machine that can be actuated to drill post holes very quickly, either manually or by power.

A further object resides in the adaptability of the drilling mechanism to be shifted to various positions on the frame for centering the auger atthe eXact place of operation without moving the machine.

A still further object resides in the adaptability of the machine to be moved from place to place without having to be dismantled, and to be stationed for operation either on sloping or level ground.

Further objects will appear from the following specication, illustrated in the accompanying drawings and finally pointed out in the appended claims.

In the drawings, Figure 1 is a sectional elevation of the machine with parts broken away;

Fig. 2 is an end view of the gears upon the crank shaft taken on line 2 2 of Fig. 3.

Fig. 3 is a sectional elevation of the differential mechanism taken on line 3-3 of Fic'. 4. i

nd Fig. 4 is a plan view of the differential mechanism taken on line 4 4 of Fig. 1.

Referring more particularly to the drawings, in which like reference numerals indicate like parts, the numeral 1 represents the base of the machine as supported upon legs 2, and these legs are adapted to be telescopically adjusted in length by set screws 3. Upon the base 1 is pivotallyv attached an elongated member 6 that is disposed to project outwardly therefrom and having attached thereto, a supporting stabilizer 7 that is adapted to make contact with the ground through the medium of a wheel 8, and this wheel is adjusted to the lower end of the stabilizer 7 by a set screw 5 in such a manner as to be caused to face in various directions.

Superimposed upon the elongated member' which is loosely interposed upon said sleeve intermediate the gears 12 and 13. This bracket 16 is held against rotary movement by two outwardly directed ianges 7 that bear against the top of an inverted U-shaped bar 17 rigidly secured upon the outer end of the elongated member 6.

18 is a pipe shaft having threads upon its outer periphery and this shaft is vertically disposed to project through slots provided in the bar 17 and the member 6 and is held.

in suspension by gear wheel 19 in meshing lcontact therewith and this gear wheel is disposed upon the pipe shaft between the bar 17 and the member 6 and in bearing contact with the latter.

The pipe shaft 18 is provided with a bar 20 that extends therethrough and this bar is provided with a longitudinal groove 21 for the reception of a feather provided on the inner periphery of the sleeve 23 for keying the bar for longitudinal movement upon the sleeve. This sleeve isfurther provided with a oog gear 24 ixedly secured thereto at its lower end and with a fixedly vsecured collar 25 at its upper end.

The pipe shaft-18 is also provided with a longitudinal slot 26 through which is projected 'the end of the crank shaft 10 and upon the outer end of this crank shaft is attached a gear wheel 27 that engages with the cog gear 24 and is held in'meshin contact therewith by an L-shaped member 2% loosely disposed upon the shaft 10 and the sleeve 23 in bearing contact with the collar 25 which "is provided upon the sleeve forthis purpose.

The lower end `of the bar 2O is adapted to have attached thereto a collar 29 rigidly secured by a set screw 30 for the reception of auger 31 which can be likewise held securely by set screw 32. The upper end of the bar 20 is also provided with a collar fixedly secured in bearing contact with the upper end of the pipe shaft 18 for sustaining the bar against displacement.

The function of his differential mechanism is for the purpose of causing the auger to penetrate the ground and be removed therefrom without reversing the -direction of its rotation.

The mode of operation is accomplished'in the following manner: The machine is manually wheeledito'the place ofcoperation and is tilted at an inclination fromthe vertical so that the weight will bear upon the wheel'of the stabilizer. The augerl is then centeredover the spot where the hole is-desired to be bored by shiftingthe elongated member on its pivot and adjusting the set screw 33. which projects upwardly through the circular slot Baprov-ided in the member 6 from itsixedly securedflocation upon the basel.

Upon centering the auger at the proper place, alever 35. which is pivotally attached to the elongated:membery and engaging with a collar provided on the sleeve` 28 is caused to be shifted until the gear wheel- 14 is broughtintomeshing contact` with the gear wheel19 iprovided onthe pipe shaft 18 rendering neutral by this shiftingoperation the gear 12. The rotation ofthecrankshaft 10 also/causes the bar 20 to move downwardly inunison with the/pipe shaft: 18fthrough the medium ofthe intermeshing gears Qt'aud 27 provided onr the sleeve 23 and the crank shaft 10 respectively. The augerk is thus caused to penetrate the 4groundto the depth desired.

To remove the auger withouty reversing the direction of its rotationso as to remove the soil'fromthehole bored,.the lever. 35 is actuated'to shift the sleeve y2S solas to bring Y inmeshing contact; the gear wheel 19" with the gear 12 which remainedneutral inthe preceding operation andv renderingA neutral the gear '14; This operation simply reverses the directionof movement ofy the pipe shaft 1,8, causing it to move upwardly throughits threadedengagement with the gear whecl'19 and lifting the auger withoutk causing the direction of its rotation tobe reversed.

It is-obvious that various changes in the details of:construction1can bevmade within thezscope of the following claims.

W'hat I', claim is new, and desire to protect by Letters Patent, is:

1: A post'y hole drilling machine comprising a-frame structure'a horizontal member superimposed upon said. frame'y and: supported from tlie ground at one end thereof, a crankshaft supportedupon saidfmember andparallel therewith, aplurality of gears of' differenty diameters adapted to be longitudinally movablel upon said crank shaft,

andi a iiXedly. secured?` gear upon the end thereof, aathreadedpipe shaft'provided with a. longitudinal slot, saidi pipe shaft vertically disposed upon theouten end of said horizontal member, andi af. gear.` threaded thereon'` alternately engageablel with certain of the gears of Said crank shaft for reversing the direction of its rotation to move said pip'eshafti upwardly or downwardly, a bar within said pipe shaft provided with a longitudinalgroove, an auger adapted to be attached to the lower end of said bar, a sleeve disposed upon said bar andengageable with said-groove, a gear Xedly secured to said sleeve in meshing` contact with the gear upon the end of saidcrank shaft, anda collar'for shifting the sliding gears offsaid crank shaft to alternately engage with the gear of said pipe shaft whereby said auger can becaused to penetrate the ground and be removed therefrom without reversing the direction of its rotation.

2. A post hole drilling machine comprising av frame structure, a member pivotally mounted upon said frame structure, a crank. shaft supported upon said member, a fixedly secured gear upon one end thereof, a sleeve longitudinally movable upon said crank shaft and provided with a plurality of gears Ofdiiferent diameters, a threaded pipe shaft provided witlra longitudinal slotsaid pipe shaft vertically disposed upon the outer end off saidmember, a gear for actuating said threaded pipe shaft and engageable alternately with certain of the gears-of said crank. shaft, a bar within said pipe shaft provided witha longitudinal groove, an auger adapted to befattached to the lower endof said bar, a sleeve disposed upon said bar. with means engageable with said groove, a gear lixedly secured to said last named sleeve in meshingl contactl with` the gear upon the end of said crank shaft'and means for shifting the sleeve offsaid crank shaft: to alternately engage with-the gear ofy said pipe shaft wher by said auger will be caused to penetrate the ground and' be removed therefroml without reversing the-direction of its rotationwhen said crank shaftv is actuated.

3. A post hole drilling machine comprising a frame structure, a member pivotally mountedk and laterally shiftable upon. said frame structure, a crank shaft carried by saidmember, a rotatable shaft providedwith an auger upon the lower end thereof, saidk shaft` vertically mounted upon the outer end 115 of' said member, differential mechanismoperatively connected to said rotatable shaft and adapted to be actuated by` said crank shaft whereby said auger can be caused'to penetrate the groundand be'removed there- 120 from-without reversing the direction of: its rotation.

4. A. post hole drilling machine comprisingfa frame structure, an elongated member pivotally attached to said'fraine andshift- 125 able in a radius from said pivot* point, a crank shaft having a gear fixedly secured thereto at one end thereof, said crank shaft mountedly upon said member and provided1 with: asleeve slidable longitudinally there- 130 upon, a plurality of gears of different diameters ixedly secured to said sleeve, a bracket loosely disposed upon said sleeve intermediate said gears and provided with a rotatably mounted gear engageable With the smaller gear of said sleeve, a pipe shaft vertically mounted upon the outer end of said member and provided with a longitudinal slot approximately the length thereof, a bar rotatably -disposed Within said pipe shaft and provided with a groove, a gear adapted to be longitudinally movable upon said bar in meshing contact With the gear upon the end of said crank shaft, an auger carried by the lower end of said bar, and means for shifting the sleeve of said crank shaft whereby the gears thereof will be caused to alter* nately engage the gear of said pipe shaft and actuate the same upwardly or down- Wardly when said crank shaft is actuated.

5. A post hole drilling machine comprising a frame having telescopically adjusted legs, an elongated member pivotally attached to said frame and shiftable at a radius from said pivot point, a stabilizer attached to the outer end of said member having a telescopically adjusted leg in contact With the ground, a Wheel carried by said leg, a crank shaft rotatably mounted upon said member provided With a fiXedly secured gear at one end thereof, a sleeve slidable longitudinally upon said crank shaft and provided With a plurality of gears of different diameters xedly secured thereto, a bracket loosely disposed upon said sleeve intermediate said gears and provided With a rotatably mounted gear engageable with a smaller gear of said sleeve, a pipe shaft vertically mounted upon the outer end of said member and provided with a longitudinal slot approximately the length thereof, a bar rotatably disposed Within said pipe shaft and provided With a groove, an auger carried by the lower end of said bar, a sleeve carried by said bar and provided With a feather engageable With said groove, a gear xedly secured to said last named sleeve engageable with the gear upon the end of said crank shaft, a collar carried by said last named sleeve, a bracket loosely engageable With said bar and With said crank shaft for sustaining the gearsthereof in meshing contact, and means for shifting the sleeve of said crank shaft in either direction whereby the gears thereof Will be caused to alternately engage with the gear of said pipe shaft whereby said auger will penetrate the ground and be removed therefrom Without reversing the direction of its rotation When said crank shaft is actuated.`

Signed by me at Seattle, Washington, this 23rd day of April, 1918.

AUGUST T. NISWANGER. Witnesses:

R. J. Cook, D. C. KHNS.

Copies of this patent may beobtained for ve cents each, ny addressing the Commissioner of Patents, Washington, D. C. 

